AS50300

Name: AS50300 — CustodianDC Limited
Creator: ipdex

CustodianDC Limited ISP registered in United Kingdom

39IPv4 prefixes

7IPv6 prefixes

96%RPKI-valid

#3,902AS Rank

326/326RIS visibility

#84Rank in United Kingdom

2009-12-16Allocated

CustodianDC Limited (AS50300) — ISP, registered in United Kingdom. announces 39 IPv4 prefixes + 7 IPv6 prefixes. Rank in United Kingdom: #84. Allocated: 2009-12-16.

IPv4 39IPv6 7

Announced prefixes · 46

v4 109.74.240.0/24 valid
v4 109.74.241.0/24 valid
v4 109.74.242.0/24 valid
v4 109.74.243.0/24 valid
v4 109.74.244.0/24 valid
v4 109.74.246.0/24 valid
v4 109.74.247.0/24 valid
v4 109.74.248.0/24 valid
v4 109.74.249.0/24 valid
v4 109.74.250.0/24 valid
v4 109.74.251.0/24 valid
v4 109.74.252.0/24 valid
v4 109.74.255.0/24 valid
v4 176.12.104.0/24 valid
v4 176.12.105.0/24 valid
v4 176.12.106.0/24 valid
v4 176.12.107.0/24 valid
v4 176.12.108.0/24 valid
v4 176.12.109.0/24 valid
v4 176.12.110.0/24 valid
v4 185.14.164.0/22 unknown
v4 185.32.72.0/24 valid
v4 185.32.73.0/24 valid
v4 185.32.75.0/24 valid
v4 185.42.65.0/24 valid
v4 185.48.164.0/24 valid
v4 185.48.165.0/24 valid
v4 185.48.166.0/24 valid
v4 185.48.167.0/24 valid
v4 193.33.198.0/24 unknown
v4 5.102.168.0/24 valid
v4 5.102.169.0/24 valid
v4 5.102.170.0/24 valid
v4 5.102.171.0/24 valid
v4 5.102.172.0/24 valid
v4 5.102.173.0/24 valid
v4 5.102.174.0/24 valid
v4 5.102.175.0/24 valid
v4 92.118.16.0/24 valid
v6 2a00:1c10:100::/40 valid
v6 2a00:1c10:10::/44 valid
v6 2a00:1c10:30::/44 valid
v6 2a00:1c10::/44 valid
v6 2a00:1c10:cd0::/44 valid
v6 2a00:1c10:da2::/48 valid
v6 2a00:1c10:fff0::/44 valid

RPKI: rpki.cloudflare.com · 2026-06-17

Routing: 39 IPv4 · 7 IPv6 announced · RIS visibility 326/326 RIS peers · RIPEstat · 2026-06-17

Prefix history

Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)

Data table

Day	Announced prefixes
2026-06-12	46
2026-06-13	46

Internet Exchanges · 3

LINX LON1 London 20 Gbps
AMS-IX Amsterdam 10 Gbps
LONAP London 10 Gbps

Facilities · 13

13 Facilities · 2 Countries

4D Gatwick (Crawley) Crawley
4D Surrey Byfleet
Custodian CDC Dartford DA2 Dartford
Custodian CDC Maidstone 1 Maidstone
Digital Realty Amsterdam AMS3, AMS5-8, AMS10 Amsterdam
Digital Realty London LHR20 London
Digital Realty London LHR21 (closed) London
Global Switch London North London
Level(3) London (Braham Street) London
Level(3) London (Goswell Road) London
Telehouse - London (Docklands East) London
Telehouse - London (Docklands North) London
Telehouse - London (Docklands West) London

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AS50300

Announced prefixes · 46

Prefix history

Internet Exchanges · 3

Facilities · 13

AS topology · Customer cone 6

Providers · 6

Peers · 1,193

Customers · 5

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